﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Model;
using System.Data.Common;
using System.Data;

namespace DAL
{
   public abstract class DBHelper
    {
        public abstract int ExecuteNonQuery(string sql);
        public abstract object ExecuteScalar(string sql);
        public abstract DbDataReader ExecuteReader(string sql);
        public abstract DataTable ExecuteDadaList(string sql);
        public abstract void Open();
        public abstract void Close();
    }
}
